Sidewall element of a shoe



FIG. 1 is a left side elevational view of a sidewall element of a shoe showing my new design;

FIG. 2 is a rear elevational view thereof; and

FIG. 3 is a left rear perspective view thereof.

The broken line showing of a shoe in FIGS. 1-3 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a sidewall element, of a shoe as shown and described. 